<span>It has the advantage that only when the substrate is presence the genes responsible for its metabolism are turned on.</span>
This could be the different times you did the experiment
A organism can be both a primary/secondary consumer by eating both plants and animals, this makes a animal a omnivore.
The biosphere hierarchy is the most important hierarchy of life. Out of all the outward tiers in the hierarchy of life, the biosphere is really the one that is easiest to describe.
The whole Earth and every living creature on it make up the biosphere. It is the hierarchy's highest level and most encompassing. Similar ecosystems come together to create biomes, and all of the biomes on Earth together make up the biosphere. The phrase "biosphere" when broken down into its component pieces, really means "life circle."
To learn more about the biosphere click on the below link:
brainly.com/question/12467010
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